Flood levels on the San Antonio River reached a new record at Loop 410, when water rose to 34.2 feet at 10 a.m.

CNN: Flooding kills 1 in San Antonio, Texas

The gravity-based system responded as it was designed to, circulating water and steam in a continuous loop to keep the scale-model reactor at a safe temperature automatically.

CNN: Today/Tomorrow - Helping nuclear plants keep their cool

This allows the island nation to effectively manage a closed loop on industrialized and urbanized water.

FORBES: On World Water Day: A Call for Innovation

He walked fifty feet downshore, stepped onto the pond, walked a wide loop on the solid stuff, turned to shore, started toward the black water.

NEWYORKER: Tenth of December